147678561840 has 40 divisors (see below), whose sum is σ = 457803542448. Its totient is φ = 39380949760.

The previous prime is 147678561817. The next prime is 147678561841. The reversal of 147678561840 is 48165876741.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (147678561841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307663431 + ... + 307663910.

Almost surely, 2^147678561840 is an apocalyptic number.

147678561840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

147678561840 is an abundant number, since it is smaller than the sum of its proper divisors (310124980608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

147678561840 is a wasteful number, since it uses less digits than its factorization.

147678561840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615327357 (or 615327351 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 57.

The spelling of 147678561840 in words is "one hundred forty-seven billion, six hundred seventy-eight million, five hundred sixty-one thousand, eight hundred forty".